Question

once an enzyme has helped a reaction take place, it can then be used to help different reactants go through a reaction. be broken down. be reused for another reaction with the same reactants. be stored in the cell until it is needed again.

Explanation:

To determine the correct statement about enzymes after a reaction, we analyze each option:

1. Yellow card ("be used to help different reactants go through a reaction"): Enzymes are specific to their substrates (reactants) due to the lock - and - key or induced - fit model. They typically act on specific reactants, not just any different reactants. So this is incorrect.

1. Blue card ("be broken down"): Enzymes are biological catalysts. Catalysts are not consumed or broken down during the reaction they catalyze. So this is incorrect.

1. Orange card ("be reused for another reaction with the same reactants"): Enzymes, as catalysts, remain chemically unchanged after a reaction. Since they are specific to their reactants (substrates), they can be reused for subsequent reactions involving the same reactants. This matches the properties of enzymes.

1. Teal card ("be stored in the cell until it is needed again"): While enzymes can be present in cells until needed, the key property after a reaction is their reusability for the same type of reaction (with the same reactants), not just being stored. The focus of the question is on what happens after the enzyme has helped a reaction take place, and reusability for the same reactant - based reaction is a more defining post - reaction property.

Answer:

Orange card: be reused for another reaction with the same reactants.